Where can I find information on developing RIM applications for BlackBerry OS 7?

Question

Java

I decided to try my hand at developing applications for BlackBerry, or to be more precise, BlackBerry Bold 9900. As I read, the phone has J2ME support. Delivered a plug-in on Eclipse. Even JDK found. Figured out how it works. But the problem is there are many classes and functions. And I don’t know where to find their description and how to work with them. I don't even fully understand what a Midlet is. Prompt literature. Preferably in Russian. And specifically for BlackBerry. Or a site with examples of using classes, etc.